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Finding the Fourth Proportional to 65,763.19, 90,731.79 and 40,242.93

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Solution

The fourth proportional to 65,763.19, 90,731.79 and 40,242.93 is: 55,522.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,763.19 : 90,731.79 = 40,242.93 : x
  2. Step 2: Convert to fraction form
    65,763.19/90,731.79 = 40,242.93/x
  3. Step 3: Cross multiply
    65,763.19x = 90,731.79 × 40,242.93
  4. Step 4: Simplify right side
    65,763.19x = 3,651,313,073.74
  5. Step 5: Solve for x
    x = 3,651,313,073.74/65,763.19
  6. Step 6: Final answer
    x = 55,522.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.